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Class 12
Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

The fuel cost for the train to travel 500 km at the most economical speed is:

(a) β‚Ή 3750 Β  Β  (b) β‚Ή 750 Β  (c) β‚Ή 7500 Β  (d) β‚Ή 75000 Β 

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Question 49 The fuel cost for the train to travel 500 km at the most economical speed is: (a) β‚Ή 3750 (b) β‚Ή 750 (c) β‚Ή 7500 (d) β‚Ή 75000 Now, in our Cost function C(𝒗) C(𝒗) = πŸ‘πŸ•πŸ“/πŸ’ 𝒗 + πŸ”πŸŽπŸŽπŸŽπŸŽπŸŽ/𝒗 Thus, Fuel Cost = 375/4 𝑣 = 375/4 Γ— 80 = Rs 7500 So, the correct answer is (c)

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.